package kr.hkit.powerjava.chapter22.collection;

import java.util.*;

public class WordFreq {
	public static void main(String[] args) {
		Map<String,Integer> m =new HashMap<String, Integer>();
		
		String[] sample = {"to","be","or","not","to","be","is","a","problem"};
		
		for (String a : sample){
			Integer freq=m.get(a);
			m.put(a, (freq==null)?1:freq+1);
		}
		
		System.out.println(m.size()+"단어가 있습니다");
		System.out.println(m.containsKey("to"));
		System.out.println(m.isEmpty());
		System.out.println(m);
	}

}
